A retrospective study: form‐deprivation myopia in unilateral congenital ptosis

The results showed a higher frequency of myopia and more myopic SER in eyes with severe unilateral ptosis compared with the fellow eye. The myopia found in eyes with unilateral ptosis might be caused by a mechanism similar to that resulting in myopia among animals subjected to form deprivation. It is important to pay attention to possible refractive error in patients with unilateral ptosis. Surgical correction of unilateral ptosis at an early age is recommended.